Webster’s Revised Unabridged Dictionary · 1913
Viridine
Vir′i·dine (vĭr′ĭ·dĭn or ·dēn), n. [L. viridis green.] (Chem.) A greenish, oily, nitrogenous hydrocarbon, C12H19N7, obtained from coal tar, and probably consisting of a mixture of several metameric compounds which are higher derivatives of the base pyridine.